Emission factors of air pollutants from vehicles measured inside road tunnels in So Paulo: case study comparison

Autor(es)

Perez-Martinez, P. J. ; Miranda, R. M. ; Nogueira, T. ; Guardani, M. L. ; Fornaro, A. ; Ynoue, R. ; Andrade, M. F.

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY; v. 11, n. 8, p. 14-pg., 2014-11-01.

Resumo

Burning of fuels from the transport sector is one of the main sources of air pollutants emission in urban areas. In order to implement public policies concerning air quality and public health, there is a need to develop emission inventories. Measurements inside traffic tunnels can provide an evaluation of emission factors of vehicles in-use in real conditions. In this paper, we show measurements of air pollutants for a mixed vehicle fleet, heavy- and light-duty vehicles (HDVs and LDVs), in two tunnels in the metropolitan region of Sao Paulo in 2011 in order to calculate the pollutant emission factors (EFs). Measurements of carbon dioxide, carbon monoxide (CO), nitrogen oxides (NOx) and particle matter (PM2.5) were taken. High concentrations related to high-density traffic, especially during weekdays. EFs were heavily influenced by the pollutant species loads, so the total vehicle traffic and the fraction of HDV. The EF values for HDV were 3.6 and 9.2 g km(-1), for CO and NOx, respectively (5.8 and 0.3 g km(-1) for LDV). To determine EF estimates, parameters such as velocity of the air, cross-sectional area and length of the tunnel and vehicles passing at 1-h time interval were considered. (AU)

• Processo FAPESP: 08/58104-8 - Narrowing the uncertainties on aerosol and climate changes in São Paulo State: NUANCES-SPS
• Beneficiário: Maria de Fátima Andrade
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 11/18777-6 - Avaliação das emissões veiculares de compostos orgânicos e inorgânicos provenientes da combustão de biocombustíveis e suas contribuições na qualidade do ar na RMSP
• Beneficiário: Thiago Nogueira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado